[ISN] Exploits for several million Microsoft servers posted

From: InfoSec News (isnat_private)
Date: Fri May 04 2001 - 03:15:01 PDT

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    By: Thomas C Greene in Washington
    Posted: 04/05/2001 at 07:01 GMT
    Several exploits have been developed for a buffer overflow
    vulnerability in servers running IIS 5.0 on Windows 2000 Server,
    Windows 2000 Advanced Server and Windows 2000 Datacenter Server, which
    we reported on Tuesday.
    The vulnerability exists in the .printer ISAPI (Internet Server
    Application Programming Interface) filter
    (C:\WINNT\System32\msw3prt.dll), which enables Web-based control of
    networked printers, due to an unchecked buffer in msw3prt.dll.
    A malicious HTTP .print request containing approximately 420 bytes in
    the 'Host:' field enables execution of arbitrary code, and if handled
    right will yield system-level access on the target machine.
    Microsoft has posted a patch, which it 'strongly urges' admins to
    install; but the number of machines running IIS on Win2k is so immense
    (several million at least) that cracking unpatched victims will be
    like shooting fish in a barrel.
    With that in mind, computer enthusiast dark spyrit has put together
    jill.c, "an exploit code that will give you a remote command shell,
    reverse telnet style on a vulnerable host has been released; this
    exploit code takes advantage of a vulnerability in IIS that allows
    remote attacker to overflow one of IIS's internal buffers causing it
    to execute arbitrary code."
    From Wanderley Abreu we have a memory-leak exploit called webexplt.pl;
    and from Ryan Permeh of eEye Digital Security, which discovered the
    vulnerability, we have a non-malicious exploit called iishack2000.c,
    which creates a file in the root of drive C imploring unpatched
    innocents to fix their systems.
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